silicium

Avoid sand crucibles, as silicium may be reduced and absorbed by the aluminum, inducing brittleness.

I made a note of the discovery, and when I got home began a series of experiments with lead, leaving silicium for another time.

Silex (silicium combined with oxygen) is contained in the hair and in some of the secretions.

These are the signs for the atomic weight of lead, and of silicium.

These zoophytes extract from the sea water the lime and silicium which are found there in the state of soluble salts.